There are reports in newspapers around the world today on odd Vegan Heather Mills call for people to cull cows and start drinking rats milk. Now at the risk of offending some people the term "odd Vegan" is probably tautological. Is this woman insane? How many rats would you need to get enough milk for a cup of tea.
According to a Press release by Viva Mills was saying that we are the only mammal to continue drinking milk after we are weaned and that drinking rat milk makes as much logical sense as drinking cows milk. And why is she saying that - because she and her cohorts reckon that cows are contributing as much as 18% to the worlds build up of green house gases.
I reckon you probably need the mass of 10,000 rats to make one cow and that the collective farts of 10,000 rats is probably equivalent to that of one cow. Therefore the suggestion is a spurious one ;)